With a sample size of 400, the calculated standard error of mean is 2 with a mean of 120. Whatsample size would be required so that we could be 95 % confident that the population mean is within± 3.5 of the sample mean ? (Z value with 95% confidence for two tailed test is 1.96).

Answered: Image /qna-images/answer/967f1621-ee8b-4aa9-afc8-ecff945587f6.jpg

Answered: With a sample size of 400, the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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With a sample size of 400, the calculated standard error of mean is 2 with a mean of 120. What sample size would be required so that we could be 95 % confident that the population mean is within + 3.5 of the sample mean ? (Z value with 95% confidence for two tailed test is 1.96).